We now know that chloroplasts are derived from which group of free-living organisms?
a. mitochondria
b. algae
c. cyanobacteria
d. archaea
c. cyanobacteria
Biology & Microbiology
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Which researchers showed that DNA is the genetic material?
A) Watson and Crick B) Hershey and Chase C) Garrod and Griffith D) Meselson and Stahl
Biology & Microbiology
Which part of the sperm contains the chromosomes?
A. flagella B. tail C. middle piece D. cell membrane E. head
Biology & Microbiology
A monosomic cell would produce gametes with how many chromosomes?
A) N B) N and N-1 C) N-1 D) N+1 E) N and N+1
Biology & Microbiology
Which radical idea did Cuvier propose based on his studies of Earth’s history??
a. extinction of species
b. evolution of species
c. Earth as billions of years old
d. an unchanging Earth
e. static species composition
Biology & Microbiology